R - AMUSE code
... Two of the boundary conditions are fairly obvious, at the centre of the star M=0, L=0 at r=0 At the surface of the star its not so clear, but we use approximations to allow solution. There is no sharp edge to the star, but for the the Sun ρ(surface)~10-4 kg m-3. Much smaller than mean density ρ(mean ...
... Two of the boundary conditions are fairly obvious, at the centre of the star M=0, L=0 at r=0 At the surface of the star its not so clear, but we use approximations to allow solution. There is no sharp edge to the star, but for the the Sun ρ(surface)~10-4 kg m-3. Much smaller than mean density ρ(mean ...
Part I: Modeling Light Years - The “Student
... Part III: Calculating a Light Year The huge distances between objects in space are really big numbers and difficult to work with! If you were an astronomer, would you like to have to use these numbers every day? Probably not! That’s why astronomers came up with a new unit for the distances in the un ...
... Part III: Calculating a Light Year The huge distances between objects in space are really big numbers and difficult to work with! If you were an astronomer, would you like to have to use these numbers every day? Probably not! That’s why astronomers came up with a new unit for the distances in the un ...
Patterns in the Sky - Madison Public Schools
... Earth orbits the Sun (revolves) once every year: • at an average distance of 1 AU ≈ 150 million kilometers. • with Earth’s axis tilted by 23.5º (pointing to Polaris) It rotates in the same direction it orbits, counterclockwise as viewed from above the North Pole. ...
... Earth orbits the Sun (revolves) once every year: • at an average distance of 1 AU ≈ 150 million kilometers. • with Earth’s axis tilted by 23.5º (pointing to Polaris) It rotates in the same direction it orbits, counterclockwise as viewed from above the North Pole. ...
Folie 1
... Large proper motions, log N – log S → cooling, not accreting nearby, born in close star forming regions (Christian Motch) detection limited by interstellar absorption (Bettina Posselt) ...
... Large proper motions, log N – log S → cooling, not accreting nearby, born in close star forming regions (Christian Motch) detection limited by interstellar absorption (Bettina Posselt) ...
chap18_f04_probs
... = 1.7 10-24 kilogram / meter3 13.51 (6.4 106 meters)3 = 1.7 10-24 kilogram / meter3 1.1 1021 meters3 = 0.0019 kilograms or 1.9 grams (!) A very small mass. PROBLEM 18-10: To ionize interstellar hydrogen, a photon must have a wavelength smaller than 91.2 nanometers (9.12 10-8 m). As ...
... = 1.7 10-24 kilogram / meter3 13.51 (6.4 106 meters)3 = 1.7 10-24 kilogram / meter3 1.1 1021 meters3 = 0.0019 kilograms or 1.9 grams (!) A very small mass. PROBLEM 18-10: To ionize interstellar hydrogen, a photon must have a wavelength smaller than 91.2 nanometers (9.12 10-8 m). As ...
The Life Cycle of a Star and the Hertzsprung
... stars of different ages and in different stages, all at the same time. It is also a great tool to check your understanding of the star life cycle. In the Hertzsprung-Russell (HR) Diagram, each star is represented by a dot. There are lots of stars out there, so there are lots of dots. The position of ...
... stars of different ages and in different stages, all at the same time. It is also a great tool to check your understanding of the star life cycle. In the Hertzsprung-Russell (HR) Diagram, each star is represented by a dot. There are lots of stars out there, so there are lots of dots. The position of ...
The buoyant force on an object totally submerged in a fluid depends
... Predicts emission and absorption lines of hydrogen and hydrogen-like ions Predicts x-ray emissions (Moseley’s law) Gives an intuitive picture of what goes on in an atom The correspondence principle is obeyed... sort of It can’t easily be extended to more complicated atoms No prediction of rates, lin ...
... Predicts emission and absorption lines of hydrogen and hydrogen-like ions Predicts x-ray emissions (Moseley’s law) Gives an intuitive picture of what goes on in an atom The correspondence principle is obeyed... sort of It can’t easily be extended to more complicated atoms No prediction of rates, lin ...
The sun
... How Was the Solar System Formed People believe that our solar system was formed from a giant rotating cloud of gas and small parts of rock and metals. This cloud is called a nebula according to this theory, the solar nebula started to shrink. As it got smaller it spun faster then flatten. into a dis ...
... How Was the Solar System Formed People believe that our solar system was formed from a giant rotating cloud of gas and small parts of rock and metals. This cloud is called a nebula according to this theory, the solar nebula started to shrink. As it got smaller it spun faster then flatten. into a dis ...
The Milky Way - 清華大學物理系歡迎頁 Welcome to
... Comparing absolute and apparent magnitudes of Cepheids, we can measure their distances (using the 1/d2 law)! The Cepheid distance measurements were the first distance determinations that worked out to distances beyond our Milky Way! Cepheids are up to ~ 40,000 times more luminous than our sun => can ...
... Comparing absolute and apparent magnitudes of Cepheids, we can measure their distances (using the 1/d2 law)! The Cepheid distance measurements were the first distance determinations that worked out to distances beyond our Milky Way! Cepheids are up to ~ 40,000 times more luminous than our sun => can ...
diffraction and interference
... Do you see interference between two light bulbs? No! Light in bulb is produced by many atoms each atom doing its own thing phase changes randomly and rapidly Waves go in and out of phase -- bright to dark -faster than we can observe ...
... Do you see interference between two light bulbs? No! Light in bulb is produced by many atoms each atom doing its own thing phase changes randomly and rapidly Waves go in and out of phase -- bright to dark -faster than we can observe ...
low surface brightness galaxies
... When this infall happens, we assume that the galaxy is stripped of its hot gas reservoir so it is no longer able to accrete fresh material for star formation. The galaxy then rapidly consumes its cold gas moving towards the red sequence. ...
... When this infall happens, we assume that the galaxy is stripped of its hot gas reservoir so it is no longer able to accrete fresh material for star formation. The galaxy then rapidly consumes its cold gas moving towards the red sequence. ...
Matariki powerpoint
... salty with their tears. Tane the god of light was so sorry for the them that he snatched Tataraimaka’s net and hauled it up to the sky. There, the seven fishes transformed into stars. ...
... salty with their tears. Tane the god of light was so sorry for the them that he snatched Tataraimaka’s net and hauled it up to the sky. There, the seven fishes transformed into stars. ...
Neutron Stars
... • Our atoms were once parts of stars that died more than 4.6 billion years ago, whose remains were swept up into the solar system when the Sun formed ...
... • Our atoms were once parts of stars that died more than 4.6 billion years ago, whose remains were swept up into the solar system when the Sun formed ...
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L 35 Modern Physics [1] Modern Physics
... and the Bohr Atom • Niels Bohr, a Danish physicist, used the quantum concept to explain the nature of the atom. • Recall that the orbiting electrons, according to classical ideas, should very quickly radiate away all of its energy • If this were so, then we would observe that atoms emit light over a ...
... and the Bohr Atom • Niels Bohr, a Danish physicist, used the quantum concept to explain the nature of the atom. • Recall that the orbiting electrons, according to classical ideas, should very quickly radiate away all of its energy • If this were so, then we would observe that atoms emit light over a ...
L34 - University of Iowa Physics
... classical explanation • According to classical physics, if the intensity of the light is strong enough, enough energy should be absorbed by the electrons to make them pop out • The wavelength of the light should not make a difference. ...
... classical explanation • According to classical physics, if the intensity of the light is strong enough, enough energy should be absorbed by the electrons to make them pop out • The wavelength of the light should not make a difference. ...
THE SUN - Halton District School Board
... The Sun formed 4.5 billion years ago, and will run out of fuel (hydrogen) in about 5 billion years. ...
... The Sun formed 4.5 billion years ago, and will run out of fuel (hydrogen) in about 5 billion years. ...
Historical pursuit of the "heavens"
... ellipses… not perfect circles. An ellipse can be drawn with this method ...
... ellipses… not perfect circles. An ellipse can be drawn with this method ...
coefficient extinction molar riboflavin
... Most quantitative Analytical chemistry in organic chemistry is conducted using HPLC with UV detectors One wavelength may not be the best for all compound in a mixture. Affects quantitative interpretation of HPLC peak heights ...
... Most quantitative Analytical chemistry in organic chemistry is conducted using HPLC with UV detectors One wavelength may not be the best for all compound in a mixture. Affects quantitative interpretation of HPLC peak heights ...
Document
... • To know the general types of telescopes and the advantages and disadvantages of each one. • To know the primary parts and functions of each part of a telescope. • To know the importance of the diameter of the objective and to know how the magnification of a telescope is related to the focal length ...
... • To know the general types of telescopes and the advantages and disadvantages of each one. • To know the primary parts and functions of each part of a telescope. • To know the importance of the diameter of the objective and to know how the magnification of a telescope is related to the focal length ...
P1 Physics Revision Workbook
... boundary between two transparent substances. Why does light split up into different colours when it passes through a triangular prism? ...
... boundary between two transparent substances. Why does light split up into different colours when it passes through a triangular prism? ...
Astronomical spectroscopy
Astronomical spectroscopy is the study of astronomy using the techniques of spectroscopy to measure the spectrum of electromagnetic radiation, including visible light, which radiates from stars and other hot celestial objects. Spectroscopy can be used to derive many properties of distant stars and galaxies, such as their chemical composition, temperature, density, mass, distance, luminosity, and relative motion using Doppler shift measurements.